Doughty Scaffold Clamp: Double Coupler The Doughty Scaffold Clamp - Double Coupler is a fixed, right-angle coupler designed to securely join two 2'' diameter steel or aluminum tubes at 90 degrees. Ideal for constructing robust grids, frames, and support towers, it offers a strong, inflexible connection for staging, rigging, and structural applications in entertainment and industrial environments. Engineered for reliability and ease of use, this coupler is a go-to solution for creating stable frameworks in lighting and scenery setups. Unlike swivel couplers, the double coupler provides a rigid connection, ensuring structural integrity wherever precise 90-degree joints are required. The clamp is available in two material options—Drop Forged Steel and Pressed Steel—with distinct finishes and weights to suit various project needs. Downloads: User Manual Key Features: Designed to connect two 2'' diameter steel or aluminum tubes at 90 degrees Rigid, inflexible construction for stable structural connections Available in Drop Forged Steel or Pressed Steel materials Ideal for building lighting grids, frames, and towers Compatible with standard scaffold poles for professional rigging setups Specifications: Tube Diameter: For 2'' steel or aluminum tubes Material: Drop Forged Steel or Pressed Steel Finish: Bright Zinc Plate for Drop Forged Steel; Yellow Passivate for Pressed Steel Weight: 2.25 lbs - Pressed Steel; 2.47 lbs - Drop Forged Steel Function: Provides a fixed 90-degree connection between scaffold tubes References: Doughty Scaffold Swivel Coupler Doughty Scaffold Clamp Collection Doughty Engineering - Member of ESTA and PLASA Doughty Engineering, established in 1985, is a UK-based leader in professional rigging and lifting equipment. Their products undergo rigorous testing and meet TÜV certification standards where applicable, ensuring top-tier quality and safety across film, TV, theatre, and live entertainment industries.